兼容各大浏览器的event获取

event:

 1 //得到事件
 2 function getEvent(evt){
 3 
 4     if (evt && typeof(evt) != "undefined") {
 5         var e = window.event || arguments.callee.caller.arguments[0];
 6 
 7         if (typeof(evt) != "undefined") {
 8             e = window.event || evt;
 9         }
10 
11         return e;
12     } else {
13         if(window.event)    {return window.event;}
14 
15         try {
16             func = getEvent.caller;
17 
18             while(func!=null){
19                 var arg0=func.arguments[0];
20 
21                 if(arg0){
22                     if((arg0.constructor==Event || arg0.constructor ==MouseEvent
23                         || arg0.constructor==KeyboardEvent)
24                         ||(typeof(arg0)=="object" && arg0.preventDefault
25                         && arg0.stopPropagation)){
26                         return arg0;
27                     }
28                 }
29 
30                 func = func.caller;
31             }
32         } catch (e) {
33             return null;
34         }
35 
36         return null;
37     }
38 }

target:

 1 //获取事件操作对象
 2 function getTarget(evt) {
 3     //var e = window.event || arguments.callee.caller.arguments[0]; //获取触发事件的源对象
 4     var e = getEvent(evt); //获取触发事件的源对象
 5     
 6     if (typeof(e) != "undefined") {
 7         try {
 8             var target =  (typeof(e.srcElement) != "undefined") && e.srcElement ? e.srcElement : e.target;
 9         } catch (ex) {
10             target = null;
11         }
12         
13     } else {
14         target = null;
15     }
16     
17     return target;
18 }

事件冒泡:

//事件冒泡
function preventEvent() {
    //取消事件冒泡
    //var e = arguments.callee.caller.arguments[0] || event; //若省略此句，下面的e改为event，IE运行可以，但是其他浏览器就不兼容
    var e = getEvent(); //获取触发事件的源对象
    
    if (e && e.stopPropagation) {
        // this code is for Mozilla and Opera
        e.stopPropagation();
    } else if (window.event) {
        // this code is for IE
        window.event.cancelBubble = true;
    } 
}

 

posted @ 2015-08-26 09:49  幻星宇  阅读(338)  评论(0)  编辑  收藏  举报